Fry together in 3 tbsp of cooking oil......till fragrant.....
1 large yellow onion (sliced)
3 handful of dried shrimps (softened & chopped)
1 tsp Szechuan peppercorn
10 pieces shitake mushrooms (cut into halves)
Put the fried mixture on top and below the marinaded fish in a baking casserole. Cover with aluminium foil. Bake in a preheated oven at 200 degree C for 30 mins.